21451264362 has 48 divisors (see below), whose sum is σ = 50823620640. Its totient is φ = 6484917600.

The previous prime is 21451264357. The next prime is 21451264363. The reversal of 21451264362 is 26346215412.

21451264362 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 1 + 2 + 643 + 6 + 2 = 666.

It is a super-2 number, since 2×21451264362² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21451264363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45312 + ... + 212027.

It is an arithmetic number, because the mean of its divisors is an integer number (1058825430).

Almost surely, 2^21451264362 is an apocalyptic number.

21451264362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21451264362 is an abundant number, since it is smaller than the sum of its proper divisors (29372356278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21451264362 is a wasteful number, since it uses less digits than its factorization.

21451264362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257779 (or 257776 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 21451264362 its reverse (26346215412), we get a palindrome (47797479774).

The spelling of 21451264362 in words is "twenty-one billion, four hundred fifty-one million, two hundred sixty-four thousand, three hundred sixty-two".